Pinpoint Test A: The Brake Shift Interlock System Does Not Release/Lock Correctly

WARNING: This page is about a different variant/trim than selected.

A1 CHECK DTCs
- Ignition ON.
- Connect the scan tool.
- Is DTC B2575 set?
- Yes: GO to A2.
- No: The issue may not be in the Brake Shift Interlock Actuator (BSIA) electrical system. GO to SYMPTOM CHART - EXTERNAL CONTROLS .
A2 CHECK FUSE 5 (10A)
- Ignition OFF.
- Remove Smart Junction Box (SJB) fuse 5 (10A).
- Check fuse: SJB 5 (10A).
- Is the resistance less than 5 ohms?
- Yes: GO to A3.
- No: GO to A4.
A3 CHECK THE POWER CIRCUIT FOR VOLTAGE
- Disconnect: Selector Lever C3233.
- Ignition ON.
- Measure the voltage between selector lever harness C3233-1, circuit CET53 (BU/OG), vehicle harness side and ground, while applying the brake pedal.
  
  Fig 1: Measuring Voltage Between Selector Lever Harness C3233-1, Circuit CET53 (BU/OG), Vehicle Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to A6.
- No: GO to A5.
A4 CHECK THE POWER CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: SJB C2280C.
- Measure the resistance between selector lever harness C3233-1, circuit CET53 (BU/OG), vehicle harness side and ground.
  
  Fig 2: Measuring Resistance Between Selector Lever Harness C3233-1, Circuit CET53 (BU/OG), Vehicle Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10, 000 ohms?
- Yes: GO to A5.
- No: REPAIR circuit CET53 (BU/OG) for a short to ground. CLEAR the DTCs. TEST the system for normal operation.
A5 CHECK THE POWER CIRCUIT FOR AN OPEN
- Ignition OFF.
- Measure the resistance between the selector lever harness C3233-1, circuit CET53 (BU/OG), vehicle harness side and SJB C2280C-23, circuit CET53 (BU/OG), vehicle harness side.
  
  Fig 3: Measuring Resistance Between Selector Lever Harness C3233-1 And SJB C2280C-23, Circuit CET53 (BU/OG)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: INSTALL a new SJB. CLEAR the DTCs. TEST the system for normal operation.
- No: REPAIR circuit CET53 (BU/OG) for an open. CLEAR the DTCs. TEST the system for normal operation.
A6 CHECK THE GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Measure the resistance between selector lever harness C3233-5, circuit GD116 (BK/VT), vehicle harness side and ground.
  
  Fig 4: Measuring Resistance Between Selector Lever Harness C3233-5, Circuit GD116 (BK/VT), Vehicle Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: INSTALL a new selector lever. REFER to SELECTOR LEVER - FUSION or SELECTOR LEVER - MKZ .
- No: REPAIR circuit GD116 (BK/VT) for an open. CLEAR the DTCs. TEST the system for normal operation.